Study of the asymmetry of hot-spot self-emission imaging of inertial confinement fusion implosion driven by high-power laser facilities

Yunsong DONG (董云松); Dongguo KANG (康洞国); Wei JIANG (蒋炜); Zhicheng LIU (刘志诚); Zhongjing CHEN (陈忠靖); Xing ZHANG (张兴); Xin LI (李欣); Chuankui SUN (孙传奎); Chuansheng YIN (尹传盛); Jianjun DONG (董建军); Zhiwen YANG (杨志文); Yudong PU (蒲昱东); Ji YAN (晏骥); Bo YU (余波); Tianxuan HUANG (黄天晅); Wenyong MIAO (缪文勇); Zhensheng DAI (戴振生); Fengjun GE (葛峰峻); Dong YANG (杨冬); Feng WANG (王峰); Jiamin YANG (杨家敏); Shaoen JIANG (江少恩)

doi:10.1088/2058-6272/ab9804

Plasma Science and Technology > 2020 > 22(8): 84003-084003. > DOI: 10.1088/2058-6272/ab9804

Yunsong DONG (董云松), Dongguo KANG (康洞国), Wei JIANG (蒋炜), Zhicheng LIU (刘志诚), Zhongjing CHEN (陈忠靖), Xing ZHANG (张兴), Xin LI (李欣), Chuankui SUN (孙传奎), Chuansheng YIN (尹传盛), Jianjun DONG (董建军), Zhiwen YANG (杨志文), Yudong PU (蒲昱东), Ji YAN (晏骥), Bo YU (余波), Tianxuan HUANG (黄天晅), Wenyong MIAO (缪文勇), Zhensheng DAI (戴振生), Fengjun GE (葛峰峻), Dong YANG (杨冬), Feng WANG (王峰), Jiamin YANG (杨家敏), Shaoen JIANG (江少恩). Study of the asymmetry of hot-spot self-emission imaging of inertial confinement fusion implosion driven by high-power laser facilities[J]. Plasma Science and Technology, 2020, 22(8): 84003-084003. DOI: 10.1088/2058-6272/ab9804

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Study of the asymmetry of hot-spot self-emission imaging of inertial confinement fusion implosion driven by high-power laser facilities

¹ Research Center of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang 621900, People's Republic of China
² Institute of Applied Physics and Computational Mathematics, Beijing 100088, People's Republic of China
³ Department of Engineering Physics, Tsinghua University, Beijing 100086, People's Republic of China

Funds: This work was supported by National Key R&D Program (No. 2017YFA0403204) and Laser Fusion Research Funds for Young Talents (No. RCFPD1-2017-1).

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Received Date: January 03, 2020
Revised Date: May 28, 2020
Accepted Date: May 28, 2020

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Abstract

Abstract

Implosion asymmetry is a crucial problem quenching ignition in the field of inertial confinement fusion. A forward-calculation method based on 1D and 2D hydrodynamic simulations has been developed to generate and study the x-ray images of hot-spot self-emission, indicating asymmetry integrated over the entire drive pulse. It is shown that the x-ray imaging photon energy should be higher to avoid the influence of the remaining shell. The contour level (percentage of the maximum emission intensity) and spatial resolution should be as low as possible, optimally less than 20% and 3 um, for characterization of higher-mode signatures such as P₈–P₁₂ by x-ray self-emission images. On the contrary, signatures of lower-mode such as P₂ remain clear at all contour levels and spatial resolutions. These key results can help determine the optimal diagnostics, laser, and target parameters for implosion experiments. Recent typical hot-spot asymmetry measurements and applications on the Shenguang 100 kJ class laser facility are also reported.
- inertial confinement fusion,
- implosion,
- x-ray self-emission,
- hot-spot asymmetry

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References

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Study of the asymmetry of hot-spot self-emission imaging of inertial confinement fusion implosion driven by high-power laser facilities